人教版1.They were talking___the bell rangA.when B.while C.where

人教版
1.They were talking___the bell rang
A.when B.while C.where D.what time
2.John was dressed in brown____Mary was dressed in bule.
此题选项和上题一样
3.He isn't old enough to go to scholl.(改为同义句）
He is___ ____ ____ go to school.
4.You are too weak to go there alone.(改为同义句）
You are____ ____ ____to go there alone.